Buoyancy assist tool with debris barrier
US10995583B1 · kind B1 · utility
4Cited by
26References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 31, 2019 |
| Grant date | May 4, 2021 |
| Priority date | — |
| Expiry date | Oct 31, 2039 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B2200/08
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A downhole apparatus comprises a casing string with a removable plug therein to block flow therethrough. A flow barrier is positioned in the casing below the removable plug and the removable plug and the flow barrier defining a buoyancy chamber therebetween. A debris barrier positioned above the removable plug includes a frangible disk. A stretchable connecting ring is connected to the frangible disk and to the casing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.